Across
- 1. Gets its name from the German for 'goblin ore' (6)
- 3. Named after the Greek for lime (7)
- 5. Named after a Swedish village (9)
- 7. The unlucky 13th element (8)
- 13. The hardest and densest of the lanthanides (8)
- 14. The lightest of all metals (7)
- 17. One component of common table salt (6)
- 19. Named for the father of nuclear physics, Ernest Rutherford (13)
- 20. The most abundant element in Earth's atmosphere (8)
- 21. Rubies get their red colour from this (8)
Down
- 2. The first element to be artificially created (10)
- 4. Banana's are famously full of it (9)
- 6. Considered the heaviest stable element (7)
- 8. Used as laughing gas at the dentist (8)
- 9. The most common element in the universe (8)
- 10. Responsible for the red colour in fireworks and flare (9)
- 11. Despite the US 5 cent coin having this nickname it is only composed of 25% of this element
- 12. Named after the latin name for Copenhagen, where it was discovered (7)
- 15. The densest naturally occurring element (6)
- 16. The most unstable naturally occurring element (8)
- 18. The only metal which is liquid at room temperature (7)
- 21. Used to make diamonds, graphite, and as a pigment (6)